Cosmetic brush



FIG. 1 is a perspective view of a cosmetic brush showing my new design;

FIG. 2 is a front view thereof, a rear view being symmetrical to thefront view thereof;

FIG. 3 is a plan view thereof, a bottom view being identical to the planview thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a right side view thereof.

The broken lines depict portions of the cosmetic brush that form no partof claimed design.

CLAIM The ornamental design for a cosmetic brush, as shown anddescribed.